package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.tomcat.util.security.MD5Encoder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;
import sun.security.provider.MD5;

import java.time.LocalDateTime;
import java.util.List;


@Service
@Slf4j
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;
    @Autowired
    private HttpMessageConverters messageConverters;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();



        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }
        //进行密码md5加密
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        //密码比对
            //
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }
    /**
     * 新增员工
     */
    public Result save(EmployeeDTO employeeDTO) {
        //先判断员工是否已经存在
        Employee employee = employeeMapper.getByUsername(employeeDTO.getUsername());
        String msg = "";
        if (employee != null) {
            //
           msg = employeeDTO.getUsername() + MessageConstant.ALREADY_EXISTS;
           return Result.error("该用户已存在");
        } else {
            //不存在
            Employee employee1 = Employee.builder()
                    .username(employeeDTO.getUsername())
                    .name(employeeDTO.getName())
                    .phone(employeeDTO.getPhone())
                    .sex(employeeDTO.getSex())
                    .idNumber(employeeDTO.getIdNumber())
                    .password(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()))
                    .status(StatusConstant.ENABLE)
                    .createTime(LocalDateTime.now())
                    .updateTime(LocalDateTime.now())
                    .createUser(BaseContext.getCurrentId())
                    .updateUser(BaseContext.getCurrentId())
                    .build();
            employeeMapper.insert(employee1);
            msg = employeeDTO.getUsername() + MessageConstant.ADD_SUCCESS;
            return Result.success(msg);
        }
    }
    /**
     * 分页查询
     */
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //开启分页
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        Page<Employee> page =employeeMapper.pageQuery(employeePageQueryDTO);

        Long total = page.getTotal();
        List records = page.getResult();
        return new PageResult(total, records);

    }
    /**
     * 启用禁用员工账号
     */
    public Result startOrStop(Integer status, Long id) {
        employeeMapper.startOrStop(status, id);
        String msg = status == StatusConstant.ENABLE ? "启用成功" : "禁用成功";
        return Result.success(msg);
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @Override
    public Result<Employee> getById(Long id) {
        return Result.success(employeeMapper.getById(id));
    }

    /**
     * 修改员工信息
     * @param employeeDTO
     * @return
     */
    @Override
    public Result update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        employee.setId(employeeDTO.getId());
        employee.setName(employeeDTO.getName());
        employee.setUsername(employeeDTO.getUsername());
        employee.setPhone(employeeDTO.getPhone());
        employee.setSex(employeeDTO.getSex());
        employee.setIdNumber(employeeDTO.getIdNumber());
        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.update(employee);
        return Result.success(MessageConstant.ADD_SUCCESS);

    }


}
